Process and apparatus for manufacture of blown articles



Feb. 24, 1925.

W. .J. WOODS PROCESS AND APPARATUS FOR MANUFACTURE OF BLOWN AR TICLES Filed Jan. 26,- 1923 2 Sfieets-$heet 1 INVENTOR J. Woods ATTORNEY Feb. 24, 1925.

w. J. \NOODS PROCESS AND APPARATUS FOR MANUFACTURE OF BLOWN ARTICLES Filed Jan. 26. 1925 E9 I 5. I

Sheets-Sheet 2 Willi lNVEN'TOR oi m igigiiieaiieza filed. January 23, 1923, Serial 1%. $15,111.

5, Wows, a 0.; America,

Steuben 5:522:1 im emeii new anti 12 fm Vii'nmovemenh, in "z'oeesses and Apparatus .eizsiiiae im'e of LIGWT: Artidies, of which Lilfi following is speviiice ivion. ,3 For the QMFPOE of wni'emenee, 1115 1ned used in soone "veni-ion Wiii tion Wiih ei ing on apparatus. anci method 1 i1, E. 0i i'iiteni to the umpire Machine [PH ET, V Lompa'ny as the assignee m A. i, Unified, iiithougi' iii wiii he. understood, as hereinout methods other thin that the part of i116 blank which i to form the neck is m eiuiy elongate .1 iii -eepeob 50 the eiongation. of other j'mriiions the hizmk. To remedy this my fipieies corrugating that cSiiig surface of ti e pressing "inst portion 0: 5 the one EU subsequent ehy the s ..r;face=: rea of "eh-e it-is increased Withoui; sub-- in Hie 5 n at s eh pain-c. fliis increase 0" iiis in rm increase in the t3] ihe skin at portioi'z, due t increase in the heatloss eoi'rugaieii skin ihe eci gaceiit sosimh sh:

dmwiii s,

n-ami claimed in the patent,

:iiim? to ihe phmger in the, atmosphere, so that the 'in which eel-responding parts are designated "by corresponding marks of referenee:-

Figure l is a section through a moid plum ger embodying my invention;

Fig. S2 transverse section on the line X-X thereof, srmi Figs. 3, 4, and 6 represent SilCk'ESSlVO steps in the formation of a bulb according to the method of this 2m )iiCii'HOi).

I ihe iressm lun 'er i. sunihn to ine A Q j p pressing plunger (designated by 81) oi ihe aforesaid patent, except that the emitted cupehzipeq rec-eels vthe'zxfein is corrugated on its irmers'urface around the lower edge thereof, forming a series of serrations It will be understood that ihese serrations, (for the purpose hadin' mind, namely, of.increasing the surface area of the pressed blank Without material change in crosssec- Lionel area theieof) are rather numerous, ciose together, and 'shaliow. In praeiice, I have employed about sixteen of these serratiozis to the inch, each seri-eiiion having at its highest. pair; the height of 7 about one thirty-so2ond of an inch.

In Fig-wires 3 to 6, in which K have represent ed a, method 0:5 forming a blown article by the use improved giass pressing eri, and by present method, the plonger 1 is snown as having enze'reci a, smfiabie glass receiver 3 {correspondii'ig to the receiver 10 of the aforesaid psi-tom), the lower end of such receiver being eioseci by a glass-carrying spindle 4 such as descrihed in -the More said patent. As shown, this epindie ineludes a dome-shaped. head 6 (corresponding to the head 9% of the aforesaid patent).

The pressing operation 'represented as being performed in Figure 3 is identical with that represented being perfor'mefl in Figure 2? of the aforesaid. patent, except foethe pi'esenee of the in'ternai corrugations in the plunger 1. The blank havingbeen thus formed, the piunger and glass-receiver are iifieei of!" ililfi end of the spindle, and the dome-shapedhead, 6 in ehe spindle is lowered, leaving the blank in the form of a meniscous saipponi on the upper end of the spinciie, as shown-in Figure i.-

J'is described in the patent, the spinoile is then inverted and pufied air is admitted into the interior of the bhmk to partly sweli, and to mid in eiongaing the same, so that,

the blank assumes the condition shown in Figure 5, which corresponds to Figure 27-" of the aforesaid patent. The blank has reached this stage by a stretching of its skin, and a flow of glass, the stretch for each portion of the surface, and the flow of glass at any point in the blank being effected by the temperature of thewskhu, and the temperature of the glass at such pointw Due to the presence of the serrations on What is now the upper end of: the blank, as is rep resented at 7. the flow of glass immediately adjacent-to the serrated skin so formed will have been less than where the skin is smooth as in the aforesaid patent, leaving: there fore, a thicker wall at this point Thebulh is now blown, as shown in Figure 6, with the result that the neck, the surface of which is formed by the serrated skin of the blank, will he thicker than would otherwise be the The blowing operation in the mold 8 (which corresponds to the mold 52 of Fig" insane? elongated prior to blowing, and. that in every such case, the'location' of thecorrugaas tions or serrations to be .produced upon the press bianl; will be such as tolocaily cool, that part of the surface 0? the blank which will he the surface of portion of wall of the finished article which it is desired 40 to thicken.

Having thus described my invention What I claim as new, and desire'to secure by Let iers Patent is v 1. A pressing plunger for forming blanks from which electrical la a p bulhs are to be blown, having an intern; cupsha ped cavity. the surface of which, at points formin g thesurface of the blank which are subsequently to form the surface of the neck 5% of the bulb is serrated. I

2. The hereinhe'fore described method oi hlo'wn articles from pressed blanks, and of ice liy controlling'the attenuation of the t ":lmess of a wall thereof during elongetio which consists in pressing a glass blank SOYIHilOnS on that part of the surface (of which will form, in the subsequent operation the'surface of the wall whosethichness is to be controlled, elongating the hlanlr controlled by such serrations, and blowing" the blank to shape.

In testimony Whereofi hereunto afiix my signature.

"Winn-ran; a WOQDQ.

glass is 

